Gas Fireplace Flow Guide Structure for Flame Visibility and Combustion
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Solution Overview
Problem
Conventional gas-burning appliances struggle to effectively control secondary air for combustion, leading to incomplete combustion and reduced visibility of yellow-orange flames, while also failing to meet regulatory requirements for thermal efficiency and compatibility with different fuels.
Innovation Solution
A gas-burning appliance with a flow guide device featuring a separator and stop plates that guide airflow upward, enhancing combustion efficiency and flame visibility without increasing gas supply, and an auxiliary exhaust device to manage waste gas flow and reduce turbulence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If secondary air for combustion is not effectively controlled, then combustion efficiency decreases and incomplete combustion occurs, but increasing gas supply to improve flame visibility increases turbulence and reduces flame height
Solution Approach 1:
The patent segments the combustion chamber into distinct regions using a separator plate, creating a primary combustion zone and a secondary air mixing zone. This segmentation allows controlled introduction of secondary air to improve combustion efficiency while maintaining flame stability and visibility without increasing gas supply.
Solution Approach 2:
The patent introduces flow guide plates as intermediary elements that mediate between the primary combustion gases and secondary air. These plates guide the airflow patterns, ensuring proper mixing and combustion while preventing excessive turbulence that would reduce flame height and visibility.
2Loss of energy
If exhaust temperature and flow are increased to improve combustion, then thermal efficiency decreases, but lowering them improves thermal efficiency yet may cause incomplete combustion
Solution Approach 1:
The patent optimizes parameters including exhaust temperature, flow rate, and air-fuel ratio through the flow guide device design. By carefully controlling these parameters, the system achieves near-complete combustion while maintaining lower exhaust temperatures to improve thermal efficiency and meet regulatory requirements.
Solution Approach 2:
The patent incorporates feedback mechanisms through the flow guide structure that responds to combustion conditions. The separator and flow guide plates create a system where exhaust gases and secondary air interact in a controlled manner, automatically balancing combustion completeness and thermal efficiency based on operating conditions.
3Productivity
If flame color is made blue or colorless to achieve complete combustion, then combustion efficiency improves, but aesthetic requirement for yellow-orange decorative flame is not met
Solution Approach 1:
The patent applies local quality by creating different combustion zones with different characteristics. The flow guide device ensures that the visible flame portion maintains yellow-orange color for aesthetics, while controlled secondary air mixing in specific zones promotes complete combustion, achieving both goals simultaneously.
4Adaptability or versatility
If one single model is designed to be compatible with different fuels (natural gas and LPG), then versatility improves, but combustion performance may decrease for specific fuel types
Solution Approach 1:
The patent designs the flow guide device and combustion chamber with universal characteristics that work effectively with different fuel types including natural gas and LPG. The separator plate and flow guide geometry are optimized to accommodate variations in fuel properties while maintaining high combustion efficiency and flame quality across different fuel sources.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution improves combustion efficiency, increases the visibility and height of yellow-orange flames, and enhances thermal efficiency while reducing turbulence and heat accumulation, making the appliance more compatible with various fuels and regulatory standards.
Implementation Method 1
the air in the combustion chamber would be heated and expanded, which makes the air go up and exit the combustion chamber through the exhaust pipe due to the stack effect
Implementation Method 2
The combustor is provided in the combustion chamber in the firebox. With the heat generated by the combustor while combusting
Implementation Method 3
the air in the combustion chamber would be heated and expanded, which makes the air go up and exit the combustion chamber through the exhaust pipe due to the stack effect
Implementation Method 4
the enclosed combustion chamber would have negative pressure inside, which sucks the outside fresh air into the combustion chamber to provide oxygen necessary for continuous combustion
Data Source
AI summary
A gas-burning appliance includes a combustor and a flow guide device engaged with the combustor. The combustor has a gas outlet. The flow guide device includes a separator and two stop plates. The separator has an opening. Each of the stop plates is located at the opening, and a top edge thereof is higher than a top surface of the separator. The combustor is located below the separator with the gas outlet corresponding to a space between the stop plates. The flow guide device has at least one first air inlet, which is located below the separator, and communicates with the space between the stop plates. A gas fireplace includes a firebox, a translucent shield, and the gas-burning appliance. A separator divides the firebox into an air chamber, which receives the combustor, and a combustion chamber. Whereby, the visibility of flame and the combustion efficiency could be improved.